The Seat,valve, cataloged under National Stock Number 4820-01-220-5652, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Twc-Thevalve Company. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-220-5652 |
| Primary Part Number | 636340 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Twc-Thevalve Company |
| Status | ACTIVE |
| Material | CARBON OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 636340 PRIMARY | Twc-Thevalve Company (USA) |
| Reference | Meaning |
|---|---|
| 636340 | 3/9 Design control — primary reference U.S. Government activity |
| 636340 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-220-5652 is a Seat,valve, manufactured by Twc-Thevalve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-220-5652 has 1 manufacturer part number on file: 636340 (Twc-Thevalve Company).
Key specifications for 636340: Special Features: FOR 5.000 IN. VALVE ADDITIONAL MATERIAL INFORMATION, CARBON STEEL, WITH NUMBER 5 STELLITE HARD FACING FOR WALWORTH 5, FIGURE 5341F, 150 SWING CHECK VALVE, USA DESIGN IN; Material: CARBON OVERALL. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.